The Kardashian family allegedly leaked the news of Blac Chyna's pregnacy to promote their reality show, according to sources.

Chyna's relationship with Rob Kardashian has not gone down well within the Kardashian family, and a source told Mail Online: "She had that moment stolen from her."

The model's representative claims she was pressured into making the announcement earlier than intended after the story was leaked to the media. The couple had planned to make the announcment on Mother's Day in the US (May 8), but a source said that the news was broken because Rob is starring in an episode of Keeping Up With The Kardashians this Sunday.

They told People magazine: "She would have preferred to have announced it on Mother's Day herself, but her hand was forced.”

"Allegedly the other half of her family leaked her story so she had to announce it.”

The spokesperson added that the only people who knew about the news was himself and Blac’s good friend Amber Rose, and said they could have done it to promote their show.

"The only people that knew from Chyna's side was myself and Amber. Her mother didn't even know. [Chyna's] moment was taken from her, which is really sad.”